"I always went to weddings and thought: 'Why is the mother-of-the-bride crying?'" she said. "But I completely understand why now. It’s because it’s so amazing to think your daughter is now grown up, leaving home and starting her own life."

And Fergie couldn't be happier with the woman her daughter has grown to be. "My proudest moment was watching Eugenie standing tall, very proud to show her scoliosis scar in her low-backed dress," she revealed. "I’d gone to all the fittings and sat there beaming with delight, and because there was no veil it was a very strong statement."

Like any good royal, Eugenie checked to make sure the decision was in-bounds, if unconventional. "We rangSt. George’s Chapelto make sure there wasn’t a special rule specifying veils must be worn," Fergie said, "but there wasn’t and Eugenie just wanted to be herself."

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Not that it would've mattered in her mother's eyes. "She was just so radiant," Fergie shared.